Alpha Kouta has finally started dating his scary Omega next-door neighbor, Ryuunosuke. Despite their relationship's unique beginnings, everything's going well-they share a bed, walk home together, and enjoy sensual nights. But biology disrupts their paradise in a way Kouta never expected-Ryuunosuke's insisting that Kouta bite his neck! Against his will, his alpha urges call him to mark his mate, and he finds himself struggling with a shocking realization about their relationship…